I went to get new spark plugs for my 2005 Yukon 5.3 L with 195,000 miles. The original plugs were AC Delco 41-110 .I've had 41-110 in all three of my Yukon's 1997, 2004 , 2005 now the parts store tells me the there has been a change to AC Delco 42-962 . I'm a little confused they changed...